中国大陆甘肃省陇南市两当县的邮政编码是742400。
The postcode of Liangdang County, Longnan City, Gansu Province, China is 742400.
本文分析了两当县人口负增长的原因，并对解决这一问题提出了相应对策。
The paper discusses the causes about the negative growth of population in Liangdang County and puts forward appropriate countermeasures to resolve the issue.
本文分析了两当县人口负增长的原因，并对解决这一问题提出了相应对策。
The paper discusses the causes about the negative growth of population in Liangdang County and puts forward appropriate countermeasures to resolve the issue.
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